Just got done installing my EDGE CTS fuel pressure monitor. I am concerned about the readings. At idle I am in 40-50 psi range. I have read you never want to go below 45 for any period of time. My concern also is that I have the blue spring upgrade. (Don't know what my pressure was at the time I installed the upgrade). I was expecting to see 65-70 psi. What reading are most folks getting with the blue spring upgrade?? Many thanks.

I had a similar issue when I installed my Edge EAS fuel pressure gauge. I had the blue spring upgrade and at idle I was reading 60 or so psi but it would drop down into the 20s or 30s at WOT. I ended up replacing the HFCM and now at idle I read 70 psi and it drops to around 63 at WOT.

I agree! it sounds like your fuel pump. I ran my old 185s with just a RR and stock pump. My Regulator raises fuel pressure as boost increases, and the stock pump would push as high as 75 psi at WOT. So if you have the blue spring, but are still seeing 45psi with stock injectors I would guess your pump is going.

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